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此部分所列出的扩展项不适用于生产环境――它们要么太老（已废弃），要么太新（试验中）。</p>

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以下扩展库的行为――包括其函数的名称和所记载的有关此扩展库的其它任何东西――可能没有任何通知就在 
PHP 的未来版本中进行变更。使用这些扩展时风险自担。</p>

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    <li class="listitem"><p class="para"><a href="book.imagick.html" class="xref">ImageMagick</a></p></li>
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